It's Happening Tonight!

SPORTS—Tennis fans who may have missed their heroes in action during their heyday may want to check out PowerShares Series Tennis, where some of the game's greats reunite in an attempt to kick each other's ass on the court. Legends John McEnroe, Andre Agassi, Jim Courier, and James Blake go head-to-head in three matches, for the chance to claim a piece of a $1 million prize pie. WSHModa Center, 1 Center Court, 7 pm, $25-250

MUSIC—The psychedelic-rockin' folksters of the Parson Red Heads are celebrating a decade of strumming, singing, and playing their hearts out. They put on a fun, inclusive show that should be especially festive for their anniversary. So go show them how much we appreciate their 10 years of service to our ears. CFw/Norman, Mike Coykendall; Mississippi Studios, 3939 N Mississippi, 9 pm, $8-10